What is the significance of the flash and fire point?
Flash point: It is the lowest temperature at which vapours of the material will ignite, given an ignition source. Fire point: The fire point of a fuel is the lowest temperature at which the vapour of that fuel will continue to burn for at least 5 seconds after ignition by an open flame.
What is the main significance of determining the flash and fire point of the lubricating oil sample?
The flash point (typically 225 degrees C or 440 degrees F for mineral oils) is an indication of the safety hazards of a lubricant with respect to fire and explosion. The flash point and the slightly higher fire point are covered by ASTM D92 and D93.
What is meant by fire point?
Definition of fire point : the lowest temperature at which a volatile combustible substance continues to burn in air after its vapors have been ignited (as when heating is continued after the flash point has been determined) — compare ignition temperature.
What is the significance of pour point?
The pour point, or the temperature at which a lubricant ceases to flow, is important in appraising flow properties at low temperature. As such, it can become the determining factor in selecting one lubricant from among a group with otherwise identical properties.
What the difference is between flash and fire points?
flash point: The temperature at which fuel oil gives off vapor that flashes when exposed to an open flame. fire point: The temperature to which fuel oil must be heated to burn continuously when exposed to an open flame.
What is the significance of pour point for carrying chemical cargoes?
What is flash point of an oil?
The flash point of oil is the temperature at which the vapor over the liquid will ignite upon exposure to an ignition source. A liquid is considered to be flammable if its flash point is less than 60°C. Flash point is an important factor in relation to the safety of spill cleanup operations.
What is fire point chemistry?
The fire point is the temperature to which the product must be heated under the prescribed conditions of the method to burn continuously when the mixture of vapor and air is ignited by a specified flame (ASTM D92). From: Environmental Organic Chemistry for Engineers, 2017.
What is pour point and its significance?
In lubrication: Pour point. The pour point, or the temperature at which a lubricant ceases to flow, is important in appraising flow properties at low temperature. As such, it can become the determining factor in selecting one lubricant from among a group with otherwise identical properties.
What is significance of determining the pour point of a lubricant?
Pour point is more significant for Lubricating oils. Pour points provide the lowest temperature for that fluid at which it can transfer by pouring. The high value of pour point means it can become semi-solid at that temperature which may cause jamming of the machine during operation.
What is the definition of flash point in chemistry?
flash point, the lowest temperature at which a liquid (usually a petroleum product) will form a vapour in the air near its surface that will “flash,” or briefly ignite, on exposure to an open flame. The flash point is a general indication of the flammability or combustibility of a liquid.
What is cloud and pour point write its causes and significance?
When the lubricant oil is cooled slowly, the temperature at which it becomes cloudy or hazy in appearance, is called its cloud point; while the temperature at which the lubricant oil cease to flow or pour, is called its pour point.
What is the significance of cloud point?
Cloud point is an important quality specification for diesel fuels. This is an indicator of the tendency of a fuel to form wax crystals when cold. These crystals can clog the atomizer that injects fuel into the combustion chamber of a diesel engine.
What is the significance of steam emulsification number?
The significance of steam emulsification number The emulsion has a tendency to collect dirt, dust etc which reduces the lubricating property emulsification number arrears vegetable oils have high stream emulsification number whereas vegetable oils have high steam oils have high steam emulsification number.
What is the significance of cloud and pour point of the automotive fuels?
The significance of cloud and pour points Cloud point is of more significance for fuel oils than lubricating oils. Pour point is important for the lubricants used in low temperature. If the high pour point of lubricant is used at low temperature then it would freeze jamming the machine parts.
What is significance of cloud point?
What is significance of steam emulsion number?
Explanation: Steam emulsification number is the time (in seconds ) required for an emulsion of lubricating oil and water to separate into distinct layers at 900C.
What is fire point lubricant?
The fire point for a lubricant is usually 8 to 10 percent above the flash point. The flash point and fire point should not be confused with the auto-ignition temperature of a lubricant, which is the temperature at which a lubricant will ignite spontaneously without an external ignition source.